I've stumbled upon this channel: History Buffs. There are some interesting movie reviews, done from the angle of historic accuracy.

One in particular turned out to be much more than just a movie review. I'ts about Dance with Wolves. As I really like the movie, naturally I was curious to see how much of it was historically accurate. Turns out that quite a lot. After reviewing the movie the author goes on to continue the vid talking about Sioux history. The vid concludes with Standing Rock protests against an oil pipeline.